<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>语义标签</title>
    <style>
      header {
        height: 200px;
        background-color: aquamarine;
      }

      nav {
        height: 100px;
        background-color: aqua;
        margin-top: 15px;
      }

      aside {
        float: left;
        width: 300px;
        height: 600px;
        background-color: beige;
        margin-bottom: 15px;
        margin-top: 15px;
      }

      article {
        margin-top: 15px;
        float: right;
        width: 1550px;
        height: 600px;
        background-color: bisque;
      }

      footer {
        clear: both;
        height: 100px;
        background-color: antiquewhite;
      }
    </style>
  </head>
  <body>
    <!-- 
        html5新的语言标签,用来简化
        <div class="header">
        <div class="nav">
        <div class="content">
        <div class="footer">

        注意: 移动端推荐使用
     -->
    <!-- 头部 -->
    <header></header>
    <!-- 导航 -->
    <nav></nav>
    <!-- 侧边栏 -->
    <aside></aside>
    <!-- 内容 -->
    <article>
      <!-- 定义文档某个区域 -->
      <section></section>
    </article>
    <!-- 底部 -->
    <footer></footer>
  </body>
</html>
